Immediate disconnect from localhost server (Self-solved/ Daft mistake)

[Bahnmor]

Launcher/pack Version: Launcher 1.0.1.1 Tekkit 3.0.0|1.2.5|Latest

Operating System: Win7 64bit

Version of Java: Jre7

Description of Problem:

Client loads up fine, server activates fine. The problem occurs when I try and connect to the server. I immediately lose my connection to an 'End of Stream' error. I can confirm that this also happens with another player connecting remotely. The same type error message appears both on his client and on my server readout.

This world has been played frequently over the past few weeks and runs (relatviely) bug free.

Error Messages:

[sEVERE] java.io.IOException: Received string length longer than maximum allowed (90 > 16)

2012-04-23 00:32:51 [sEVERE] at net.minecraft.server.Packet.a(Packet.java:120)

2012-04-23 00:32:51 [sEVERE] at net.minecraft.server.Packet1Login.a(Packet1Login.java:38)

2012-04-23 00:32:51 [sEVERE] at net.minecraft.server.Packet.a(Packet.java:79)

2012-04-23 00:32:51 [sEVERE] at net.minecraft.server.NetworkManager.h(NetworkManager.java:152)

2012-04-23 00:32:51 [sEVERE] at net.minecraft.server.NetworkManager.c(NetworkManager.java:270)

2012-04-23 00:32:51 [sEVERE] at net.minecraft.server.NetworkReaderThread.run(SourceFile:76)

2012-04-23 00:32:51 [iNFO] /127.0.0.1:53437 lost connection

While I am able to do some basic troubleshooting, I don't have the knowledge of java to understand what it's trying to tell me.

(EDIT: I had forgotten that I still had the 'dev build' button selected. Stepping down to 'recommended build' has fixed the issue. I hang my head in shame that it took me two hours of attempted problemsolving before I looked at that part)

[moomoohk]

thanks for the fix

[umwetardid]

Just to clarify for people, Check the server build you downloaded on the technic site. I downloaded 2.1.1 so I changed the build in the technic launcher.

You change it by clicking on the top left and opening the Tekkit Drop down.

Go into Options, and select modpack build. (I picked 2.1.0 because i had the 2.1.1)

Hope this helped!